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<domain> Service not available, closing
transmission channel
Requested mail action not taken:
mailbox unavailable
Requested action aborted: local error in
processing
Command not implemented
Requested action not taken: mailbox
unavailable
The communication is terminated
because the mail server stopped.
The requested mail process was not
executed because the mailbox is not
available.
The requested execution was canceled
because an error occurred in the mail
server.
The mail server does not support the
command that was sent.
The request was not executed because
the mailbox is not available.
Codes Error Messages Description
●
A List of SMTP Error Codes
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